Carnegie Supernova Project: Observations of Type IIn supernovae
Author
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Taddia, F.
Author
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Stritzinger, M.
Author
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Sollerman, J.
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Phillips, M. M.
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Anderson, J. P.
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Boldt, L.
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Campillay, A.
Author
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Castellón, S.
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Contreras, C.
Author
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Folatelli, Gastón
Author
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Hamuy Wackenhut, Mario
Author
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Heinrich-Josties, E.
Author
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Krzeminski, W.
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Morrell, N.
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Burns, C.
Author
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Freedman, W.
Author
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Madore, B.
Author
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Persson, S.
Author
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Suntzeff, Nicholas B.
Admission date
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2015-06-30T19:38:56Z
Available date
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2015-06-30T19:38:56Z
Publication date
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2013-04-10
Cita de ítem
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A&A 555, A10 (2013)
en_US
Identifier
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DOI: 10.1051/0004-6361/201321180
Identifier
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https://repositorio.uchile.cl/handle/2250/131533
General note
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Artículo de publicación ISI
en_US
Abstract
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Aims. The observational diversity displayed by various Type IIn supernovae (SNe IIn) is explored and quantified. In doing so, a more
coherent picture ascribing the variety of observed SNe IIn types to particular progenitor scenarios is sought.
Methods. Carnegie Supernova Project (CSP) optical and near-infrared light curves and visual-wavelength spectroscopy of the Type IIn
SNe 2005kj, 2006aa, 2006bo, 2006qq, and 2008fq are presented. Combined with previously published observations of the Type IIn
SNe 2005ip and 2006jd, the full CSP sample is used to derive physical parameters that describe the nature of the interaction between
the expanding SN ejecta and the circumstellar material (CSM).
Results. For each SN of our sample, we find counterparts, identifying objects similar to SNe 1994W (SN 2006bo), 1998S (SN 2008fq),
and 1988Z (SN 2006qq). We present the unprecedented initial u-band plateau of SN 2006aa, and its peculiar late-time luminosity and
temperature evolution. For each SN, mass-loss rates of 10−4−10−2 M yr−1 are derived, assuming the CSM was formed by steady
winds. Typically wind velocities of a few hundred km s−1 are also computed.
Conclusions. The CSP SN IIn sample seems to be divided into subcategories rather than to have exhibited a continuum of observational
properties. The wind and mass-loss parameters would favor a luminous blue variable progenitor scenario. However, the
assumptions made to derive those parameters strongly influence the results, and therefore, other progenitor channels behind SNe IIn
cannot be excluded at this time.